Translingual

Etymology

Tenth century “West Arabic” variation of the Nepali form of Hindu-Arabic numerals (compare Devanagari script १ ‎(1, “éka”)), possibly influenced by Roman numeral Ⅰ.

Symbol

1

1. The cardinal number one, a single thing or unit.
2. A digit in decimal and every other base numbering system, including binary, octal, and hexadecimal.

   15 × 134 = 2010

   0010 0011₂

   0x1000E001

3. (mathematics) The identity element with respect to multiplication in a ring.

   a×1 = a

4. (computer science) Bit state corresponding to binary digit 1, or on or true.
5. (mathematics) A Boolean or truth value corresponding to true.

   f : B^k → B : B = {0, 1}

6. (mathematics) The one-point topological space, trivial ring, trivial group, a category with a single object or a (canonical) singleton.
7. (mathematics, set theory) indicator function of a set.

See also

• (Arabic digits): 0 1 2 3 4 5 6 7 8 9

Alternative forms

Derived terms

See also

• 1 (number) in Wikipedia

Other representations of 1:

• Styles
• 

  The digit ‘1’ in a digital seven segment display.

English

Symbol

1

1. The number one (1).
2. (Internet slang, leetspeak, sarcastic) Deliberate misspelling of !, imitating someone who is too excited to consistently press the shift key while typing exclamation marks.

   A: sum1 hlep me plz im alwyz l0zin!!1!?!/?

   B: Thts bcuz ur st00pid!!!!!11!!oneone!!1!!eleven!1

Translations

Derived terms

• (ordinal) 1st

Synonyms

• (sarcastic, deliberate misspelling of !): one, eleven

American Sign Language

Numeral

1

1. one

Noun

1

1. A metasyntactic variable used to denote a person.

Chinese

Pronunciation

Noun

1

1. (slang) top (gay slang)

Derived terms

• 10